nell neil we -- >> neil: we know the fbi was alerted to tamerlan and his trips. gone through everything, his associations, everything about the guy, and they gave him the clean bill of health. they couldn't we d anything. we do know enough that about. we also know there might have been other requests for information on the younger brother. but there was enough outside interest expressed abroad to at least look at one of these suspects here that -- it does stretch credulity to wonder if it was left to just these guys? >> by the way, let's not forget, there were additional arrests in connection with this case over the weekend in the boston area. there will five additional arrests connected to this boston bombing and possibly to these bombers. so, come on. but i think, lock, the overseas trip is the key and it's interesting, janet napolitano can the department of homeland security chief, neil, says there was a ping when the older brother went to russia. okay. was there a ping when he returned? apparently not. because apparently, after he was there for six months, no